As much as I hate to say it: Too little, too late.

They dropped the ball in not getting the content out faster, especially given that the first game had the exact same free content and the relative brevity of Crackdown 2.
It was short in SP and insanely short in co-op, even on the hardest difficulty.
I still want to like the game, but unless the new paid DLC adds a large amount of content, I'm inclined to pass.